Tulista marginata (Lam.) G.D.Rowley
Marginate Tulista
Marginate Tulista is a critically threatened acaulescent succulent endemic to a very restricted area of South Africa's Western Cape, growing on quartzite soils within the fynbos biome. It is one of two Tulista species classified as Endangered (IUCN EN), threatened primarily by habitat destruction for agriculture and urbanisation, and by illegal collection for the collector market.
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Overview
| Category | Classification |
|---|---|
| Family | Asphodelaceae |
| Genus | Tulista |
| Growth Habit | Acaulescent; compact rosette; sparse offset production. |
| Conservation Status | Endangered (IUCN EN). Habitat fragmented to fewer than 10 known localities. Illegal collection compounds the threat. Separated from Haworthia (Manning et al. 2014). |
| pH Target | 4.5 – 6.0 |
| Type | Pure quartzite soil, very poor and acid, with excellent drainage. |
Origin & Habitat
Morphology
Lanceolate leaves 8–18 cm, dark green with a broad conspicuous white-cream leaf margin (from which the epithet marginata derives) running the full leaf length. Tubercles are small and scattered; margins bear short cream spines.
ecoStem practically invisible; the flattened rosette can reach 25 cm across. Scarcity of offsets makes natural propagation slow.
ecoInflorescence 20–35 cm; white flowers with pink stripes, bilabiate; spring flowering.
ecoFibrous root system with fleshy storage roots; adapted to poor quartzite soils.
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Requirements
Soil & Substrate
Type
Pure quartzite soil, very poor and acid, with excellent drainage.
groups Beneficial Associations
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Propagation Strategy
- 1 Identify offsets with visible, well-developed white margins; wait until they are at least 3 cm in diameter.
- 2 In spring, remove the plant and separate offsets with their roots using a sterilized knife.
- 3 Callus cut surfaces for 1–2 days in an airy spot without direct sun.
- 4 Plant in well-draining mineral substrate; water gently after 5–7 days.
- 1 Sow on the surface of fine, well-draining substrate that is lightly moist.
- 2 Maintain 20–25 °C with bright indirect light; cover and ventilate daily.
- 3 Germination in 3–6 weeks; gradually remove cover.
- 4 Transplant at 6–12 months when seedlings show the diagnostic white margins.
- 1 Remove a fully mature basal leaf with a gentle twist until it detaches with the base intact.
- 2 Allow to callus for 2–3 days in a ventilated spot.
- 3 Rest the base on barely moist mineral substrate without burying.
- 4 Keep in a warm spot with indirect light; mist every 10 days. Shoots may appear in 6–10 weeks.
The white margins of T. marginata are its most striking feature; bright indirect light (not intense direct sun) maintains optimal colour contrast.
Exposing to direct midday sun that scorches and causes loss of the striking white margin.
Every 2–3 years in spring. Well-draining mineral substrate in a terracotta pot.
Once a month in spring and summer with balanced fertilizer diluted to half dose. No fertilization in autumn-winter.
Uses & Applications
Precautions / Toxicity
Non-toxic to humans or pets. EN status requires all trade specimens to come from propagation, not wild extraction.
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"T. marginata has one of the most restricted distributions in genus Tulista and across the entire tribe Aloeae; fewer than 10 wild subpopulations are known, all within a 50 km radius in the Overberg district. The broad white leaf margin is unique in the genus and served as the diagnostic character for recognising it as an independent species prior to the 2014 generic separation."
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Scientific Integrity
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Sources
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Discussion
Disclaimer
This species record is provided for educational and informational purposes only. Jardín Roca Negra does not guarantee the accuracy or completeness of the data. Content is community-curated and may be subject to revision; it should not replace advice from a qualified botanist. This species may be toxic, invasive, or subject to legal restrictions — verify before handling or cultivating. Jardín Roca Negra accepts no liability for any harm arising from reliance on this information. Images are reproduced under Creative Commons or equivalent free licenses; credits are noted below each image.